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Fix for crash in mysqld --verbose --help while initializing option

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for --init-rpl-role.

Problem: There are two variables involved in this issue,
rpl_status and rpl_role_type. The former is an array containing
the description of the possible values for the latter.

rpl_status is declared as an enumeration and is stored in a 4
bytes integer. On the other hand, my_getopt, reads enum values
into a ulong:

  *(ulong*)value= arg;

This is overwriting the memory used for rpl_role_type, 
corrupting the first entry in the array.

Fix: We fix this by re-declaring rpl_status as a ulong, so that it
has space to accommodate the value "parsed" in my_getopt .
This commit is contained in:
Luis Soares
2010-10-11 15:50:14 +01:00
parent da6cd49bee
commit f2dabc49e1
2 changed files with 4 additions and 4 deletions
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4
sql/repl_failsafe.cc
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@ -41,7 +41,7 @@
#define SLAVE_ERRMSG_SIZE (FN_REFLEN+64)
RPL_STATUS rpl_status=RPL_NULL;
ulong rpl_status=RPL_NULL;
mysql_mutex_t LOCK_rpl_status;
mysql_cond_t COND_rpl_status;
HASH slave_list;
@ -68,7 +68,7 @@ static Slave_log_event* find_slave_event(IO_CACHE* log,
functions like register_slave()) are working.
*/
void change_rpl_status(RPL_STATUS from_status, RPL_STATUS to_status)
void change_rpl_status(ulong from_status, ulong to_status)
{
mysql_mutex_lock(&LOCK_rpl_status);
if (rpl_status == from_status || rpl_status == RPL_ANY)